Description of suggested behaviour:
Allow the usage of wildcards in group names so that you can easily add or remove all groups start with a certain tag.

Example of suggested behaviour:
Say we have a couple of groups all starting with something-. If you want to remove all of the groups the suggested syntax would be lp user <user> parent remove something-*. In this case, all groups starting with something- would be removed from the user.

Sorry, whilst I can appreciate this may be useful, I want to keep wildcards as a concept for permissions which are resolved during the checking process, not command handling.